Teledictaphone



March 2, 193.'.7. o. H. scHuLz TELEDICTAPHONE Filed Aug. 28, 1934 2Smets-sheet 1 Imi.

Qc?? ATT RNEY March 2, 1937.

TELEDICTAPHONE y Filed Aug 28,' 1954 2 Sheetsv-Shee't 2 N54 INVENTOR IBY Patented Mal?. 2, v1937 1 UNITED.l STATES PATENTy OFFICE vTELEnIcTAPHoNE 'otto n."scnu1z,'oak`1ana, Cain.' Application August 28,1934, Serial No. 741,165 l i 22 claims. (ci. 11e-s) v This invention, anautomatic tele-dictaphone,

l combines al1 of the advantages of the telephone and dictaphone,automatically converting the -usual telephone into a voice recordingdevice 5 when the party called does Ynot answer the telephone, andpermitting a message'to be delivered `inthe absence of the party called.

Thisinvention is useful in many ways and under many conditions,since itis designed'to y .l permit the delivery of messages, telegrams, letarecord of their-call, an executive may dictatev v letters from his home`orany remote point to his oilice, or a telegram may. be` recordedwithout.

waiting for an Aanswer to the telephone. i Under existing methods it isnecessaryto arrange specialA connections, suchv as connecting the j l inits simplest -iorm as associated with a twotelephone receiver to' adictaphone, -or'set predetermined switches-to obtain a record of acall,-

necessary connections when two telephone sets provided with thisinvention are llinked together either directly of through a centralstation.

' The voice recording device may be remotely located relative to thetelephone or may be installed inthe same cabinet with the telephone, andafter a message is recorded, the entire arrangement resets itself tonormal position ready iii for another call. l y

The objects of the invention are as follows: First; to link twotelephone sets together with necessary equipment for automatic recordingof `me`ssages in the absence of the party called. 40 Second, Toassociate a telephone anda voice recording device in such mannerthatwhenno answer is obtained from a party called on the telephonewithin a predetermined period or number of signal impulses, thatvthevoice recording devices. will be automatically, coupled to the` callerstelephone set, sov that a message may be delivered to a record in theform o! a cylinder, disc, orillm.

50 Third, To provide means for disrupting the operation of the voicerecording device at any.

erative position ready for anotherV call when the caller hangs up theirreceiver. r Fifth, To provide meansi'or couplingvsuch voice recordingdevice to any type of wired or wireless telephone or telegraph foroperation by a pre' 5 determined vsignal or series of impulses.

Sixth, To provide' means where great amplitude is required,foramplifying the voice modulations to the recording' device.

Seventh, Toprovide means for automatically q() maintaining the recordingdevice or recorder out of contact with the recording medium at all timeswhen the recording device is not controlled by a callers telephone. Y

l Other objects and advantayesof the invention will become apparent asthe/'following description is read on the drawings forming a part of`this spec cation, and in which similar reference characters are used todesignate similar parts through-A out the several views, of which: 20

Fig. l' is a wiring diagram of the invention shown subscriber magnetoline of the bridging type. Fig. 2 is a detail view of the operatingpawlV connection.

Fig. 3 is a fragmentary view of the selector disc showing the teeth andidle space for limiting the movement of the disc or ratchet.

Fig. 4 is a4 modifiedfo'rm of wiring diagram adapting the invention totelephone circuits which include aseries condenser. f

. Fig. 5 is an amplifying diagram for amplifying the voice modulations.

Fig. 6 is a wiring diagram of a wireless'or radinl receiving circuitwith the invention applied 35 thereto. v l The invention includes anytype of wired or wireless telephone circuit, such as magneto, commonbattery, automatic, or other modified forms and is applicable to anytype or arrangement by 40 modification of the equipment andwiring tosuit the specific hook-up, and consists of a switching arrangementautomatically actuated by the signaling system or the telephone set orreadio transmitter of the caller or person calling, con- 45 *necting avoice or sound recording device in circuit with the callers telephonesetor radio v transmitter, so. that a vmessage may be delivered without thepresence of anyone at the answer phone or receiving circuit. 1

I3, the central oflice equipment not being shown other than theabove-mentioned plugs, cords and jacks. The radio circuit consists of atransmitter, anda receiver tuned to the same frequency.

The two telephone sets are identical, one telephone set consisting of atransmitter I4', a receiver I5, a receiver hook I6 and such otherapparatus, coils, condensers and batteries as may be required for theparticular type of circuit, and is designated as the Caller phone, andthe same parts on the Answer phone are designated by the characters I1,I8 and I9, the caller telephone being designated by the letter .C, andthe answer phone by the letter A, The circuit between the two telephonesets is completed through the wires 20, 2l, 22, and 23.

The circuit also includes the call bells 24 and 25 for telephoneoperation over wired circuits, and which bells may be operated by themagneto 26 or by the central station operator, or automatically,depending on the system of wiring.

In the wiring diagram, Fig. 1, it will be noted that the caller'sreceiver I5 is removed from the hook I6 permitting the hook to bridgethe circuits to the transmitter I4 'and receiver I5 through -contacts 28and 29, while the answer telephone hook I9, being depressed by theweight of the receiver I8,` maintains the circuit to the transmitter I1and receiver I8 open, contacts 30 and 3l being open. Obviously, the hookactually operates a switch Afor making these contacts and which switchis omitted for purposes of clarity.

Ihe parts so far described are standard and do not form a part of theinvention except in the combinations described and claimed, and thecircuit so far described is only modified for this invention by theinclusion of selector means in the signaling circuit andy the extensionof the main line circuit.

The automatic selector means may be applied i I to one or bothtelephones, as it is not necessary for any telephone set to have theselector to operate the selector of another phone, however, in thewiring diagram, both sets are shown equipped therewith, so asto fullyexplain the mutual operation between two sets.

.The automatic I'selector means is identical for each telephone setwhere the voice or sound recording device is installed land consistsrespectively of the relays 32 and 33 having one terminal connectedthrough wires 34 and 35 respectivelyA to the terminal telephone lines 20and 2I as indicated at 36 and 31, their 4other terminal being in serieswith the respective contacts 38 and 39 through wires 40 and 4I. It willbe noted that no source of current is included directly in the circuitbetween the two relays 32 and 33, and when the two hook levers I6"and I9are both depressed, that both relays are grounded by cooperation ofthese levers through a ,suitable switch (not shown) with the contacts 38and 39.

'I'he primary circuit for the relays consists of the respectivebatteries 42 and 43 having one terminal connected respectively to theconnections 34 and 35, and the other terminal connected to the contacts44 and 45 which cooperate with the receiver hooks in their raised orreleased position. Thus the battery 42 completes a circuit current canonly iiow when one receiver hook is depressed and the other released;

The relay secondary circuits consist of the armatures 46 and 41 whichare respectively connected through wires 48 and 49 to contacts 50 and 5Ifor cooperation with the receiver hooks I9 and I6 in depressed position,and the armature contactsV 52 and 53 are connected through therespective batteries 54 and 55 to one terminal of the respectiveelectro-magnets 56 and 51 through wires 58 and 59, the other terminals60 and 6I being connected to ground 62. The armatures 63 and 64 arenormally retracted by the springs 65 and 66, the armatures normallymaintaining the respective stop pawls 61 and 68 and operating pawls 1Iand 12 out of engagement with the respective selector ratchets 69 and10.

The pawls cooperate with the armatures through the connectors 13 and 14,which are slotted at one end as shown at 15 in Fig. 2, the pawlsbeingurged by the springs 16 to cooperate with the ratchetsv whenbrought into association by the armatures.

The pawl operating mechanism consists of the respective electro-magnets11 and 18 connected through wires 19 and 80 in series with the signalingor bell ringing circuits 8I-82 and through wires 83 and 84 to the returnor ground side' 22-23 of the vtelephone circuit. The respective pawls 1Iand 12 are connected to the terminal ends of the armatures 85 and 86 ofthe electromagnets 11 and 18 and are reciprocally operated thereby.

The ratchets or selector discs 69 and 10 are each provided with amultiplicity of fine teeth 81 as shown in Fig. 3, the pitch beingapproximately equal to the stroke of the armatures at the point ofconnection whereby'each impulse advances the ratchet one tooth. Thesediscs are resisted by' springs 88 and 89 which return the ratchets totheir normal position when the pawls are released.

'I'he switching mechanism for the voice or sound recordingdevice'consists of quick-throw switches 90 and 9I, which cooperate withthe pins 92 and 93 on the respective ratchets 69 and 10 and close tocontacts 94 and 95, these switches being connected to one terminal of asource of current, such as a power line 96, the other terminal 91 ofwhich is connected to the respective contacts 94 and 95 through therespective primaries 98 and 99 of transformers |00 and IOI. It will beunderstood that battery circuits may be used, and all magnets and relaysare adapted to the specific currentvused, whether direct or alternating,and the speciflc current will be used which is best adapted to thespecific circuit, since in some cases an alternating current may bedesirable using alternating current magnets and relays, while othercases may be best suited to direct current with direct current magnetsand relays.

The voice or sound recording means consists of recording devices |02 and|03, which1 may be' of the Dictaphone type or any othenwell known typesuch as a magnetically actuated diaphragm operating recording needles orpoints |04 which cooperate with the record blank, such as cylinders |05and |06, and which cylinders are driven by the respective motors I01 and|08, these motors being shown as driven through the medium of thesecondary current set up in the secondaries 2109 and IIO of thetransformers I00 and IOI,

fthrough wires III and II2, suitable reduction gearing (not shown) beingprovided between the motor and the cylinder, this recording means beingl emana.

of conventional type and not requiring detailed descriptiom Inconnection with the above, it will be understood that photographic filmmay also be used for the record blankwith the record formed through themedium of a photo-electric cell, and which process is also well known.

The recording devices I02 and II|3 are normally maintained out ofcooperation with the record blank or cylinders I t5 and |06 by means ofvarmature levers II3 and IIIi which are pivotally .mounted at H5 and II6and retracted by the springs |I1 and IIt, these armatures being incooperative relation to the electro-magnets II@ and 'which'are connectedin circuit with the isecondaries I 09 and III) of .the transformers It@and IilI as shown.

I The voice recording circuit consists of relays IZI and I22 which arealso connected' in circuit with the secondaries It!! and |Ili of thetransfarmers IUI) and IIJ I, the armatures of these relays closing acircuit across the telephone circuit 2li- 2i and 22--23 through wires|23 and' l IM, and |25-I26.

The circuit so far described is but one form of circuit using bothdirect' and alternating current electro-magnets and relays, and showingacompletely operative circuit, the operation 1 of whichv 1 is' asfollows; 2,

With both receivers I5 and I8 hung on their respective receiver hooks,all circuits are broken. One receiver I5 is removed from the hook It, asshown, closing the circuit to the receiver I5 and transmitter I4, andcoincidently closing the circuit through contact 45, battery d3, line 2I, calling the operator O at'the central station, who completes thecircuit through'v jacks I2-'I3 by means of cords I I and plugs It, (orthe circuit is automatically completed with automatic systems) 40through wire 2|), wire 34, relay 32, contact 32,

hook I9, line 22-23 or ground, to hook It.

Energization of relay 32 closes the 'circuit through hook It, wire 48,armature 46, contact 52, battery 54, magnet 56, wire 60, to ground 52,.

drawing armature 63 down and releasing pawls 61 `and 1I to cooperatewith ratchet 69. Caller C or operator O vthen by suitable means, suchas' magneto 21 rings subscriber or answer party A in the usual manner,the impulse passingthrough the signal or bell circuit 25, 4wire 8I-19,through magnet 11 and wire 83 oscillating armature 85 and pawl 1|,rotating disc 69 against the resistance of spring 88, the 'pawl 61retaining the disc against retrograde movement. It` during the courseofthe ringing receiver I8 should be lifted, the circuit to magnet 56 willbe broken at contact '5t and the spring 65 will release the pawls fromthe ratchet' and the ratchet will immediately return to its normalposition under the urgence of 28.

60 I'f the call is not answered and the receiver remains on the hook,the ratchet is rotated untilv pin 92 engages the switch 90 which isurged until the shifting spring |21 throws-the switch to contact 94,following'whch, the pawl 61 rides in the idle space |69, preventingfurther movement of the ratchet, but preventing its release, and asthis' pawl 'does not pick up the stroke of the pawl 1I, I theratchet/idles in its position, and remains in that'position until eitherthe receiver I8 is lifted off its hook, or the receiver I5 is placed onits hook. Switch 90, closing tocontact 94 lcloses the main power circuitthrough the primary 98 of transformer' |00', inducing a current in thesecondary which starts and operates motor |01, coincidently,

rotating theirecord |05. simultaneously energizthe f ace of the blank Io5, the recording dispara @br coil and point together with the frame .IMwhich is hinged at Iza, gravitationally cooperatir'ig with the cylinderor blank |05.

. i ing magnet I It, which draws armature I Ido'wn', 1 bringing therecording point IIIA in contact Coincidently, magnet I 2| is energized,closing the voice or sound circuit to the recorder through wire I23,contact i3d, armature I3I, recorder IM,

and wire mi to une r2.

The recording device is now in operation and caller C delivers theirmessage which is recorded on the cylinder, after which caller hangs uptheir receiver' I5, therebyA breaking the circuit at d5, de-energizingrelay 32, breaking circuit at 52 and through magnet v56, releasingarmature 63 which is retracted by spring 65, retractinggpawls 61 and lI,eleasing ratchet t@ which is lcounter-rotated by spring tt, p in t2 inits counter-movement engaging the opposite side of lever |32 andreversing switch tt, breaking contact at et, disrupting e operationy ofmotor IIN, releasing armature I Itto interposed condenser i3d will notpermit operation of the recorder selector byV direct current, such lacircuit requiring an alternating current for operation of thevselector.Y

The modication also includes manually con-y trolled means fonoperatingthe selector.

This modication consists of the usual transmitter I1, Areceiver It, hookI9, together -with the line IM having the condenser |33 in series. Theselector means consists of the alternating current magnet Ict which isconnected in series through contact |56, wire Itli, battery |38, magnet|35, wire |39, armature III), make-'and-break'` contact Iti, primary IMof transformer M3, switch IM to ground or lever M5. Each time switch I Mis 0H the hook, a series of impulses is Ptransmitted to operate theselector. at the other stationthrough the secondary-- Idt, line Idd andconden ser |33, operating the magnet 1t. The balance of the circuit issimilar to that described for Fig. l. f v

In Fig. 5, a modication is shown in which the voice modulationsareamplified, the modulations being transferred from the induction coilprimary Itl to the secondary IM which is tuned to a predeterminedfrequency by thecondenser H9', the modulations being impressed on' thegrid |50 of theradioamplifying tube I5'|,Jthe incoming' s closed whilereceiver I 8' sov modulations being amplied inthe customary y manner,the plate |52 being connected through suitable audio frequencytransformers |53 and succeeding stages of amplification to the recorderW2, a suitable current supply 54 being provided. v This diagram alsoshows a r producer |55 which vmay be incorporated for manualcooperation', the usual operating means and switch means (not es Ishown) being incorporated therewith. With this arrangement, the messagesmay be reproduce without removal of the record. Fig. 6 is anothermodification showing the invention as applied to radio or wirelesstransmission, using any standard transmitting and receiving circuits,and modifying them to suit the particular hook-up, a simple radiofrequency receiver being shown. u

A simple arrangment is shown in which a carrier wave |56 is firstimpressed on the antennae |51 and transferred from the antenna coil |56to the grid coil `|59 which is tuned by means of the condenser |60 tothe frequency of the incoming wave and left at this setting, thisincoming carrier current being amplified through suitable radio tubes|6| and |62 and transformer |63 to plate 64, the circuit so fardescribed being standard, and well known in the art. v

When the receiver hook I9 is depressed, plate |66 is connected in serieswith a sensitive relay |65, battery |66, electromagnet 11 to ground |61,closing a circuit through the receiver hook I9, armature 46, battery 54,electromagnet 56, bringing the pawls 61 and 1| into engagement with thedisc or ratchet 69.

The frequency of the incoming wave is too high to affect the drivingpawl 1|, and the eifective pull of the electromagnet is made. such as tooperate the vpawl only under intensified current and therefore isactuated only by modulations or audio frequency impulses.

When a series of dots |66 or impulses, (which may be made kin the formof a specific signal if desired) is impressed on the antenna, the audiofrequency fluctuations and intensity of current set up by themodulations operate the selector magnet 11, operating the selector aspreviously described.

In all other respects the device is operated similarly to thosepreviously described. After the selector has attained a predeterminedposition after throwing the switch, it cannot be moved farther due tothe omission of teeth at one point |69, which prevents operation of thepawl, and

y voice, sound, code, or telegraph signals may be recorded.

When the wave length or frequency of the transmitting station ischanged, the device automatically returns to its normal position,resetting itself, and lifting of the receiver hook automaticallydisrupts operation of the selector.

It will be noted that with the receiver on ho'ok I9, (Fig. 6), a circuitis closed from plate |64 through wire |10, switch |1|, contact |12,through magnet |65 and recorder |02 in parallel to battery |66, andcoincidently, with energization of magnet |65, another circuit is closedthrough the receiver hook i9, armature 46, battery 54 to place the pawlsin cooperation, and that when the receiver hook is released, the circuitto the magnet |65 is broken as also to magnet 56, and a circuitcompleted through plate |64, through switch I1 contact |13, receiver orloud-speaker |14 to battery |66, so that the recorder is madeinoperative when the message is audibly received.

It will be understood that variations in method, circuits, adaptation,arrangement and equipment, which variations are consistent with theappended claims, may be resorted to without detracting from the spiritor scope of theinvention or sacrificing any of the advantages thereof.

I claim.

1. In. combination, two telephone sets and a circuit therefor, a voicerecording device includ- `ing an electrically actuated recorder incooperative relation to one set, means made operative by release of thereceiver hook of the other set and inoperative by the release of thereceiver hooks of both sets and actuated by electrical impulses set upin the signaling system for the one set electrically associating theother telephone set with the recorder of saidrecording device when thereceiver of the one set remains unreleased for a predetermined signalingperiod, and made inoperative and causing the means to return to normalposition when the receiver hook of the other set is depressed.

2. In combination, two telephone stations each including transmitter,receiver, signaling device, receiver hook, a sound recording deviceincluding an electrically actuated recorder, and selective meansselectively associated with the depressed and raised positions of thereceiver hooks and actuated by electrical impulses in the circuit of thesignaling device, associating one telephone set exclusive of soundrecording device with the recording device of the vother set andexclusive of the transmitter and receiver thereof when the signalingdevice of the other set remains unanswered for a predeterminedoscillatory period of said signaling device.

3. In combination, two telephone stations each including transmitter,receiver, signaling device,

receiver hook, a sound recording device including an electricallyactuated recorder, and selective means selectively associated with thedepressed and released positions of the receiver hooks and actuated byelectrical impulses in the circuit of the signaling` device associatingone telephone station exclusive of its sound recording device with therecording device exclusive of the transmitter and receiver of the otherstation when the signaling device of the other station remainsunanswered for a predetermined oscillatory period, and disrupting theoperation of the selective means and permitting its return to normalposition when the signaling device of the other station is answered, andmeans for returning the selective means to its normal position.

4. In combination, two telephone stations each including transmitter,receiver, signaling device, receiver hook, a sound recording deviceincluding an electrically actuated recorder, and selective meansselectively associated with the depressed and released positions of thereceiver hooks and actuated in association with electrical impulses inthe circuit of the signaling device associating one telephone stationexclusive of its sound recording device directly electrically with therecording device of the other station exclusive of the other elements ofthe other station when the receiver of the other station remainsinoperative for a predetermined signal period, and disrupting theoperation and resetting the selective means to normal position when thereceiver of the other station is operated, and disrupting the operationand resetting the selective means when the cooperative relation of thetwo stations is terminated.

5. In combination, two telephone sets and a circuit therefor, each setincluding a transmitter, a receiver, a receiver hook and a signalingsystem, a sound recording device including an electrically actuatedrecorder and a record blank for each set, a selective switch for eachset controlling the recording device associated therewith andy with therecording device of the one set and opertem.

` Verating the device C Y ating the device through a suitable source ofcur- 'rent controlled by the selector switch.

6. In combination, two telephone sets and a circuit therefor, each setincluding a transmitter, a receiver, a receiver hook and a signalingsysa voice recording device including. an electrically actuated recorderand a record blank for each. set, a. selector switch for each setcontrolling the recording device associated therewith and controlled bythe receiver hooks, said selector switch lbeing actuated by electricalimpulses set up in the' signaling system of one set, said selectorswitch automatically electrically connecting the one set directly with.the recorder of said recording device oi the other set and opthrough asuitable source of current controlled by the selector switch, and

y:means rescttingsaid selector switch k-to normal position anddisrupting the current when operation of the Ione set is discontinued.7. in combination, two telephone sets and a circuit therefor, each setincluding a transmitter, a4 receiver, a receiver hook and a signalingsystem, a sound recording device inpluding an electrically actuatedrecorder and a record b for each set, a selector switch ior each setconytrolling the recording device associated therereceiver hooks, saidwith and controlled by the selector switch being actuated by electricalimpulses set upin the signaling system ofthe other set, said selectorswitch automatically electrically connecting the other set directly withthe recorder oi' said recording devlceioi the one set and operating therecording device through a suitable source oi current @controlled by theselector switch oli, the one set, and meansresetting the selector switchto normal position and disrupting the source of current when thereceiver ho'ok or the one set is released as by answer of the signal ofthe si system oi the other set. i

8.1m combination, two circuit therefor, each set including atransmitten; a receiver, a receiver hook and a signaling system, a soundrecording device including an telephone sets .and a Aelectrically.actuatedrecorder and a record bl hooks are in any o pressedposition oi the one set and the raised posifor each set, a selectorswitch for each set con-I trolling the recording device4 associatedtherewith and controlled by the receiverV hooks, said selector switchbeing actuated by electrical impulses set up in the signaling system oi"the other set, said selector switch automatically electricallyconnecting the other set directly with the recorder of said recordingdevice oi' the one set and operating the recording device through asuitable source oi current controlled by the selector switch of the-oneset when the si system remains unanswered, and means resetting theselectorswitch to normal position and disrupting the source of currentwhen the receiver ther position than the detion oi the other set. 4

v9. In combination, two sound transfer sets,` each including sound'transmitting means and sound receiving means and associated talkingcircuit, signaling each set in circuit with the talking circuit: soundrecording means including anv electrically actuated recorder i'oreach'set; connective means' for each set controlled by the control meansand actuated byelectrical impulses oi the signaling mean electricallyconnecting one set exclusive of its recording means directly with therecorder of the other set through means and control means iorr thetalking circuit after ,sie 5 a. predetermined number ci impulses, whilethe other set, exclusive of-its recording means is in normal inoperativerelation, said connective means being made inoperative through thecontrol means by` any change in electrically coop- 5 erative relation ofthe sets from that o f the one set calling and the call being unansweredby the other set.

l0. In combination with two stations linked by ga talking circuitincluding a signaling sys, lo and a switch ior each station controllingthe talking circuit, control means in parallel with each station andcontrolled by the switches of both stations, asound recor systemincluding an electrically actuated 4recorder ior each i5 station, acurrent supply ior each recor system, a ,selector controlled by eachcontrol means and electrically actuated in'circuit with the signalingsystemL completing circuit between the recording system and its currentsupply at one go station and coincidently cutting the recorder directlyin circuit with the ng circuit to the other station, saidcontrol meansdisrupting opb eration of the recording system when the switches at bothstations are both in either open or closed 2s position, and permittingactuation oi' the selector .means only when the switches arerespectively in own and closed positions.

11. In combination with two telephone stations -linked by a talkingcircuit and including a siggo naling system and a receiver hook tor eachstation; a sound recording system including an electrically actuatedrecorder, a record, and a current supply for each station, meansactuated in circuit with the signaling system completing gg circuit fromthe current supply tothe recording system and coincidently cutting therecorder directly into the circuit at one station when the receiver hookat said one station remains depressed and the receiver hook otherstation is released and means resetting th'e selector means whensaidrecelver hooks are both, either released, or depressed. l2.lnoombination with two telephone stations v i byl a talmng' circuit andincluding a signal- 45 ing system and a receiver hook ior each station,a sound recording system including an electrically actuated recorder, arecord, and a current supply, ior each station; means actuated incircuit with current supply to the recording system and coincidentlycutting the' recorder directly into the talking circuit at one stationand moving said recorder into cooperation with said record when thereceiver' hook at said one station remains de- 55 pressed and thereceiver hook at the other station is released, and means automaticallyresetting the selector means and moving the recorder out ci cooperationwith the record when said receiver 'boom are both, either released, ordepressed.

. i3. In combination with two telephone stations linked by atalkingcircuit and including a signaling system and' a receiver hook foreach' station;v a sound recording system including an electrical Yactuated recorder, a record, and a current supply, @5

ior each station, control means electrically associated with eachstation controlled by the receiver hooks ol both stations, selectormeans actuated in circuit with the signaling system and controlled bythe control means, completing circuit from the 70 at the 40 i. t 1 ng.system completing circuit trom the 50 tot 2,072,816

means resetting the selector means when said receiver hooks are both,either depressed, or released.

14. In combination with two telephone stations linked by a talkingcircuit and including signaling means and a circuit therefor and areceiver hook for each station; a sound recording system including anelectrically actuated recorder, a record, and a current supply for eachstation, control means electrically associated with each station andcontrolled by the receiver hooks of yboth stations, selector meansactuated in circuit with the signaling means and controlled by thecontrol means completing circuit from the current supply to therecording system and coincidently cutting the recorder directly into thetalking circuit at one station and moving said recorder into cooperationwith said record when the receiver hook at said one station remainsdepressed and the receiver hook at the other station is released, andmeans resetting the selector means and moving the recorder out ofcooperation with the record when said receiver hooks are both, Ieitherreleased, or depressed.

l5. In combination with two telephone stations including a talkingcircuit and a signaling system, and a switch having two sets of contactsassociated with each station; an automatic sound recording systemincluding an electrically actuated recorder, a record, and a currentsupply, for each station; means electrically associated with thesignaling system and controlled by the switches of both stationsconnecting the sound recording system of one station with its currentsupply and coincidently connecting the recorder of said one stationdirectly across the talking circuit after a predetermined period ofsignaling from the other -station while the switch vof said one stationis closed to one set of contacts and the switch of the other station isclosed to the other set of contacts, changing the relation of either orboth switches automatically returning the sound recording system tonormally inoperative position and reset for a future call.

16. In combination with two telephone vstations including a talkingcircuit and a signaling system, and a receiver-hook-actuated switchhaving two sets of contacts associated with each station; an automaticsound recording system including an electrically actuated recorder, arecord, and a current supply, for each station; control meanselectrically associated with the talking circuit and controlled by theswitches of both stations; sclector means including switch means and`electrically associated with the signaling system and controlled by thecontrol means associated therewith connecting the sound recording systemof one station with its current supply and coincidently connecting therecorder of said one station directly into the talking circuit after apredetermined period of signaling from the other station, andcoincidently moving-the recorder into cooperation with said record, andmaintaining said kconnections while the switch of said one station isclosed to one of its sets of contacts, and the switch of the otherstation is closed to the other of its set of contactsychanging therelation of 'either or both switches automatically returning the soundrecording system and associated control and selector means and recorderto normal inoperative position and reset for operation with a futurecall.

17. In combination with two telephone stations including a talkingcircuit and a ringing circuit, and a receiver hook for each station; amagnetically actuated ycontrol in circuit with each station end of thetalking circuit and controlled by the receiver hooks of both stations; aselector operated in electrical association with the ringing circuit andassociated with each control means and controlled thereby; a soundrecording system having an electromagnetic recorder, a record, and acurrent supply, and controlled by said selector tooperate the soundrecording system and connect the recorder directly into the talkingcircuit, said selector operating only at one station at which thereceiver hook is depressed.

18. Automatic, sound recording means for telephone systems comprising incombination with two telephone stations linked by a talking circuit andincluding a ringing circuit, and, a receiver hook for each station; arecording system including a record and an electro-magnetic recorder;means actuated by electrical impulses in the ringing circuit andcontrolled by the receiver hooks of both stations automaticallyconnecting the recorder directly electrically into the talking circuit,coincidently moving the recorder into cooperation with the record andcausing operation of therecording system after a predetermined period ofringing when the receiver hook at one station remains depressed and thereceiver hook at the other station is released.

19. Automatic sound recording means for telephone systems comprising incombination with two telephone stations linked by a talking circuit andincluding a ringing circuit, and, a receiver hook for each station; a.recording system including a record and an electro-magnetic recorder andmeans for driving said recording system; means actuated by electricalimpulses in the ringing circuit and controlled by the receiver hooks ofboth stations automatically connecting the recorder directlyelectrically into the talking circuit, coincidently moving the recorderinto cooperation with the record and actuating the driving means after apredetermined ringing period when the receiver hook of one stationremains depressed and the receiver hook of the other station isreleased, andv means automatically disrupting operation of, andreturning and resetting the recording system to normal inoperativeposition when the lrelation of the receiver hooksv is changed from thatdescribed.

20. Automatic sound recording means comprising, in combination with twotelephone stations linked by a-talking circuit and including a signalingsystem and, a receiver hook for each station; a sound recording systemincluding a record, driving means, and an electro-magnetic recorder, foreach station; means actuated in series with the signaling system andcontrolled through the talking circuit by the receiver hooks of bothstations electrically connecting said recorder directly into the talkingcircuit, and coincidently moving the recorder into cooperation with therecord, and starting operation of the driving means i'or operating therecording system at one station'after a predetermined period ofsignaling when the receiver hook of said one station is depressed, andthe receiver hook at the other station is released/,and meansautomatically disrupting operation of said recording system,disconnecting the recorder from the talking circuit, and moving therecorderout of cooperation with the record when the relation of thereceiver hooks is changed from that described;

tion; a mechanical type record, a recorder operable to cut arecordvtrace thereon', for one station; means to effect recordingmovement of both the record and recorder, and automatic meanscontrolling the vmeans to effect recording movement in such a way thatmovement or neither the record nor recorder takes place when thereceiver hooks of both stations are: simultaneously both in eitherreleased or depressed position, said automatic means automaticallyconnecting the recorder directly into the talking circuit and beingactuated by signal impulses therein when the receiver hook of saidonestation remains depressed and the receiver hook of the .other station isreleased and the one station is signalled.

22. A recording system comprising a talking circuit including twotelephone stations having each a receiver hook; recording meansincluding a mechanical type record and operating means and anelectrically actuated recorder therefor,

for each station; selector means at each station operated through theagency of signal impulses in the talking circuit and controlled by thereceiver hooks of both stations automatically connecting the recorder ofone station directly into vthe talking circuit, and starting theoperating means to continuously operate the record when the receiverhook of the other station is released while the receiver hook of the onestation remains depressed, and disrupting operation of the recordingmeans when either the receiver hook of said one station'is released, or,the receiver hook of the other station is depressed while the receiverhook of the one station remains depressed.

OTTO H. SCHULZ.

